JP2019008394A - Signal control device, signal control system, signal control method, and signal control program - Google Patents

Abstract

A traffic light can be controlled in accordance with a continuous change in traffic conditions.
In a signal control device (2) including a processor for providing signal control information for controlling a traffic signal installed at an intersection, the processor calculates a signal waiting time of a vehicle for a plurality of vehicle outflow directions at the intersection. Then, based on the number of times of waiting for the signal, an adjustment value of the passage permission time for the signal control information of the traffic light regarding the vehicle outflow direction is determined.
[Selection] Figure 2

Description

  The present disclosure relates to a signal control device, a signal control system, a signal control method, and a signal control program that provide signal control information for controlling a traffic signal installed at an intersection or the like.

  Conventionally, traffic signal control related to traffic lights installed at intersections, etc., changes signal control methods in response to changes in traffic conditions on the road network, etc. for the purpose of alleviating traffic congestion and congestion, and ensuring smooth traffic flow, etc. Review of rational operation of traffic lights including On the other hand, due to the reduction in public works expenses in recent years and the decrease in specialists related to road management and traffic management, there is a concern about the deterioration of traffic conditions due to the prolonged review cycle of operations. An efficient and effective new review method using the management system is expected.

  In such a review of the operation of the traffic light, for example, a change of the signal control method and an improvement of the intersection may be considered, but these require a relatively high cost for introducing new equipment. On the other hand, there is an advantage that the review of the operation of the traffic light based on the change of the control setting information (and hence the signal control information) can be realized at a relatively low cost. Concerning changes in control setting information, in particular, if the amount of blue time (permitted time) in multiple vehicle outflow directions at an intersection is inappropriate, it will directly lead to traffic congestion and congestion, so traffic conditions will continue. It is desirable to review the green time appropriately according to the change.

  As a conventional technique for realizing appropriate signal control according to changes in traffic conditions, for example, a traffic light that gives a passage permission independently of other outflow directions for a specific outflow direction from an intersection is controlled. In the signal control device for the above, when it is determined that the outflow in the specific outflow direction is not smooth based on the probe information, a technique for extending the blue time for the specific outflow direction (see Patent Document 1) In the signal control device for controlling one of the signal control patterns stored in advance according to the traffic light and controlling the light color of the traffic light, the signal control selected according to the statistical value of the traffic index for each arbitrary time zone A technique for updating a usage time zone of a selected signal control pattern to the arbitrary time zone in order to use a pattern in the arbitrary time zone (see Patent Document 2) is known.

Japanese Patent No. 5729028 Japanese Patent No. 5445471

  By the way, in the prior art described in the above-mentioned Patent Document 1, since it is determined based on the probe information that the outflow in a specific outflow direction (for example, the right turn direction) is not smooth, the probe information is displayed on the target road. When many vehicles to be provided are not traveling, there is a problem that it is difficult to appropriately perform signal control.

  Further, in the conventional technique described in Patent Document 2, only a signal control pattern selected from a signal control pattern prepared in advance is used, and a specific method for appropriately calculating the signal control pattern is also available. Since it is not disclosed, there is a problem that it cannot cope with a continuous change in traffic conditions.

  The present disclosure has been devised to solve such problems of the prior art, and the main purpose thereof is a signal control device that enables control of a traffic light according to a continuous change in traffic conditions. And a signal control system, a signal control method, and a signal control program.

  The signal control device of the present disclosure is a signal control device including a processor that provides signal control information for controlling a traffic signal installed at an intersection, the processor regarding a plurality of vehicle outflow directions at the intersection. The number of times of waiting for the signal of the vehicle is calculated, and an adjustment value of the passage permission time for the signal control information of the traffic light regarding the vehicle outflow direction is determined based on the number of times of waiting for the signal.

  The signal control system according to the present disclosure is a signal control method for providing signal control information for controlling a traffic signal installed at an intersection, wherein the number of signal waiting times of a vehicle is determined for a plurality of vehicle outflow directions at the intersection. An adjustment value of a passage permission time for the signal control information of the traffic light regarding the vehicle outflow direction is determined based on the signal waiting number.

  In addition, the signal control method of the present disclosure includes the signal control device and a road communication device that acquires information on travel time of a vehicle passing through the intersection.

  The signal control program of the present disclosure is a signal control program for causing a computer to execute processing for providing signal control information for controlling a traffic signal installed at an intersection, and a plurality of vehicle outflow directions at the intersection The computer is caused to execute a step of calculating a signal waiting time of the vehicle, and a step of determining an adjustment value of a passage permission time for the signal control information of the traffic signal regarding the vehicle outflow direction based on the signal waiting number. It is characterized by that.

  According to the signal control device, the signal control system, the signal control method, and the signal control program of the present disclosure, it is possible to control the traffic signal according to the continuous change in traffic conditions.

Overall configuration diagram showing a signal control system according to an embodiment Functional block diagram showing details of the signal control system shown in FIG. Explanatory drawing which shows an example of the road network where the traffic signal which applies a signal control system is installed Explanatory drawing which shows the 1st example of the periphery structure of the intersection in the road network shown in FIG. Explanatory drawing which shows an example of the signal display in the intersection shown to FIG. 4A Explanatory drawing which shows the 2nd example of the periphery structure of the intersection in the road network shown in FIG. Explanatory drawing which shows an example of the signal display in the intersection shown to FIG. 5A Flow chart showing the flow of parameter correction value generation by the traffic control central unit Flow diagram for updating signal control parameters by central traffic control equipment Flow chart for the display of signal control parameters and related information by the traffic control central unit FIG. 6A is a flowchart showing an example of the signal waiting number calculation process (ST102). Explanatory drawing which shows an example of the total information regarding step ST204 in FIG. Explanatory drawing which shows an example of the signal waiting frequency calculated by step ST205 in FIG. FIG. 6A is a flowchart showing an example of the blue time adjustment value determination process (ST103). Table showing an example of the relationship between the number of signal waits and temporary adjustment values The flowchart which shows the calculation method of the final adjustment value of the blue time in the case of 3 presentation in step ST304 in FIG. The flowchart which shows the modification of the calculation method of the final adjustment value of the blue hour shown in FIG. FIG. 6A is a flowchart showing an example of the blue time adjustment value condition determination process (ST104). Explanatory drawing which shows an example of the parameter correction value produced | generated by step ST603 in FIG. FIG. 6B is a flowchart showing an example of the signal control parameter update process (ST105). FIG. 6C is a flowchart showing an example of the control information display process (ST106). Explanatory drawing which shows the example of the log | history information list displayed in the process of step ST802 in FIG. Explanatory drawing which shows the example of the parameter correction value information list displayed in the process of step ST802 in FIG. Explanatory drawing which shows the example of the parameter information list after correction | amendment displayed in the process of step ST802 in FIG. Explanatory drawing which shows the example of the notification information regarding the parameter after correction | amendment displayed in the process of step ST802 in FIG. The whole block diagram which shows the modification of the signal control system which concerns on embodiment

  A first invention made to solve the above problems is a signal control device including a processor for providing signal control information for controlling a traffic light installed at an intersection, the processor at the intersection The number of times of waiting for a signal of a vehicle is calculated for a plurality of vehicle outflow directions, and an adjustment value of a passage permission time for the signal control information of the traffic light regarding the outflow direction of the vehicle is determined based on the number of signal waiting times. .

  According to this, since the passage permission time relating to the specific vehicle outflow direction is adjusted based on the number of times the vehicle waits for a signal, more appropriate traffic signal control can be performed according to a continuous change in traffic conditions.

  Further, the second invention is characterized in that the determination of the adjustment value of the passage permission time is executed in a predetermined cycle.

  According to this, by appropriately determining the cycle for determining the adjustment value of the traffic permission time, it is possible to control the traffic signal more appropriately according to the continuous change in traffic conditions on various roads.

  According to a third aspect of the present invention, the number of signal waiting times is calculated based on a travel time of a target vehicle passing through the intersection.

  According to this, it is possible to calculate the number of signal waiting times with a simple configuration by using a travel time that can be easily acquired from a road communication device or the like or can be easily generated based on information acquired from a road communication device or the like. Become.

  According to a fourth aspect of the present invention, the number of signal waiting times is calculated based on a difference between the calculated travel time and a reference time set for a travel route of the vehicle related to the travel time. .

  According to this, by considering the reference time corresponding to the travel time, it is possible to calculate the number of signal waiting times with higher accuracy.

  In addition, the fifth invention is characterized in that the signal waiting number is calculated based on a non-passable time of the target vehicle in the vehicle outflow direction.

  According to this, it is possible to eliminate the influence of the signal waiting of the vehicle in the inaccessible time by considering the inaccessible time of the vehicle in the specific vehicle outflow direction (time other than the allowed traffic time).

  In addition, the sixth invention is characterized in that the processor determines whether or not the adjustment value of the passage permission time satisfies a preset allowable condition.

  According to this, it is possible to avoid setting an inappropriate passage permission time for the traffic signal to be controlled based on a preset allowable condition.

  According to a seventh aspect of the present invention, the permissible condition includes at least one of an upper limit value and a lower limit value of a passage permission time in the signal control information.

  According to this, it is possible to avoid setting an inappropriate passage permission time for the traffic signal to be controlled based on a simple condition regarding the passage permission time.

  Further, the eighth invention is characterized in that, when the adjustment value of the passage permission time does not satisfy the permission condition, the processor corrects the adjustment value of the passage permission time so as to satisfy the permission condition. .

  According to this, even when the adjustment value of the passage permission time does not satisfy the allowable condition, it is possible to set an appropriate adjustment value of the passage permission time within a range satisfying the permission condition.

  The ninth invention is further characterized by further comprising a backup information storage unit for storing information on the passage permission time before the adjustment value of the passage permission time is applied.

  According to this, even when the adjustment value of the passage permission time is not valid, the traffic manager can easily change the adjusted passage permission time to the value before the adjustment.

  In a tenth aspect of the present invention, the processor calculates the number of signal waiting times of the vehicle for each of the plurality of vehicle outflow directions to which different indications are applied in the traffic light, and based on the plurality of signal waiting times, An adjustment value of the passage permission time is determined for each of the vehicle outflow directions.

  According to this, it is possible to control traffic signals in response to continuous changes in traffic conditions while suppressing the occurrence of imbalance in traffic in other vehicle outflow directions by adjusting the passage permission time in a specific vehicle outflow direction. It becomes possible.

  The eleventh aspect of the invention is characterized in that the plurality of vehicle outflow directions include a plurality of outflow directions relating to a vehicle having the same inflow direction to the intersection.

  According to this, it becomes possible to control the traffic lights according to the continuous change of the traffic situation with respect to the vehicles having the same inflow direction to the intersection, and the number of combinations of signal indications that can be adjusted by the present method increases.

  The twelfth aspect of the present invention is further characterized by further comprising a display unit for displaying the determined adjustment value of the permitted passage time.

  According to this, the traffic manager can easily determine whether or not the adjustment value of the traffic permission time determined by the signal control device is appropriate.

  The thirteenth invention includes the signal control device according to any one of the first to twelfth inventions, and a road communication device that acquires information relating to travel time of a vehicle passing through the intersection. Is a signal control system.

  According to this, since the passage permission time relating to the specific vehicle outflow direction is adjusted based on the number of times the vehicle waits for a signal, more appropriate traffic signal control can be performed according to a continuous change in traffic conditions.

  A fourteenth aspect of the invention is a signal control method for providing signal control information for controlling a traffic signal installed at an intersection, wherein the number of waiting times for a vehicle signal is calculated for a plurality of vehicle outflow directions at the intersection. The adjustment value of the passage permission time for the signal control information of the traffic light regarding the vehicle outflow direction is determined based on the number of signal waiting times.

  According to this, since the passage permission time relating to the specific vehicle outflow direction is adjusted based on the number of times the vehicle waits for a signal, more appropriate traffic signal control can be performed according to a continuous change in traffic conditions.

The fifteenth aspect of the present invention is a signal control program for causing a computer to execute a process for providing signal control information for controlling a traffic signal installed at an intersection, with respect to a plurality of vehicle outflow directions at the intersection. Causing the computer to execute a step of calculating a signal waiting time of the vehicle, and a step of determining an adjustment value of a passage permission time for the signal control information of the traffic light regarding the vehicle outflow direction based on the signal waiting number. Features.

  According to this, since the passage permission time relating to the specific vehicle outflow direction is adjusted based on the number of times the vehicle waits for a signal, more appropriate traffic signal control can be performed according to a continuous change in traffic conditions.

  Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

  FIG. 1 is an overall configuration diagram of a signal control system 1 according to the present embodiment. A signal control system 1 is mounted on a traffic control central device (signal control device) 2, a traffic light 3 installed at an intersection, a vehicle detector 5 for detecting a vehicle 4 passing on a road, and a vehicle 4. A road communication device 6 that communicates with the vehicle-mounted device, and a travel time measuring terminal device 7 for measuring the travel time of the vehicle 4 (the time required for the vehicle 4 traveling on the road to reach from one point to another point). And mainly.

  The signal control system 1 can be realized as an additional function of an existing traffic control system that manages traffic in a predetermined area. Alternatively, the signal control system 1 may be configured to perform traffic signal control in cooperation with an existing traffic control system. Further, the signal control by the signal control system 1 can be applied to known fixed-cycle control, traffic adaptation control, and the like.

  Although not shown in FIG. 1, in practice, the signal control system 1 is provided with a plurality of traffic lights 3, vehicle detectors 5, road communication devices 6, and travel time measuring terminal devices 7. The signal control system 1 also travels a vehicle 4 traveling on a managed road from a predetermined travel time information provider 8 (or an information database owned by the travel time information provider) via network communication or a storage medium. Time information can be acquired as appropriate.

  The traffic control central device 2 is installed in a traffic control center that performs traffic control for each region, and traffic for the traffic signal 3 based on vehicle detector information collected from the vehicle detector 5 and control setting information including signal control parameters. Perform signal control. In addition, the traffic control central device 2 is, for example, the traffic section information generated from the vehicle detector information and the travel time information (travel time generated from the information collected from the road communication device 6 and the travel time measuring terminal device 7). This traffic information can be provided to the driver of the vehicle 4 by generating traffic information related to a traffic jam section or the like based on the information included.

  The traffic light 3 is a well-known device that instructs passage permission (advance) and passage prohibition (stop) of the vehicle 4 traveling on the road, and is installed particularly at an intersection here. In the traffic control central device 2, after the signal control parameter of the next cycle is determined from the vehicle sensor information and the control setting information, the signal control information (signal control command) generated based on this signal control parameter 3 is transmitted. Thereby, in the traffic light 3, control of the signal lamp based on the signal control information is realized. The signal control parameter includes a cycle length, a split, and an offset, which are factors that determine the traffic signal display timing. Although not shown, the traffic light 3 includes not only a signal lamp that displays a predetermined lamp color (here, red, blue (green), yellow), but also a signal that controls the signal lamp based on the signal control information. A controller can be provided.

  The vehicle detector 5 is necessary for normal traffic management such as traffic volume (number of vehicles passing per unit time) and time occupancy rate (ratio of time during which a point on the road is occupied by a vehicle within a unit time). It is a well-known traffic information collection device that acquires vehicle detector information.

  The road communication device 6 includes optical beacons that are installed at a plurality of points on the road and detect the vehicle 4 passing therethrough with light (near infrared rays). It has a communication function. When the vehicle 4 is equipped with an in-vehicle device that is compatible with an optical beacon, the roadside communication device 6 can acquire the travel history from the in-vehicle device in addition to the vehicle identification information (vehicle ID) or the vehicle identification information. . By obtaining vehicle identification information from the road communication device 6, the traffic control central device 2 can generate travel time information of the vehicle based on the time difference that the same vehicle has passed through the road communication device 6 at a plurality of points. it can. In addition, the traffic control central device 2 can generate travel time information from the difference between the entry time and the exit time to the section based on the travel history by acquiring the vehicle identification information and the travel history from the road communication device 6. it can.

  The road communication device 6 is not limited to an optical beacon, as long as at least the traffic control central device 2 can acquire travel time information (or information necessary for calculating travel time) of the vehicle 4. (For example, an ITS spot) can also be used.

  The travel time measuring terminal device 7 captures a license plate of a vehicle passing by cameras installed at a plurality of points on the road, and reads information such as numbers on the license plate by image processing and vehicle identification information and time information Is provided to the traffic control central device 2 as information for calculating the travel time of the vehicle. Thereby, the traffic control central device 2 can generate travel time information of the vehicle based on the time difference that the same vehicle has passed through the travel time measurement terminal devices 7 at a plurality of points.

  FIG. 2 is a functional block diagram showing details of the signal control system 1 shown in FIG. The traffic control central device 2 includes a main device 2A that realizes an existing function related to traffic management, and an additional device 2B that is attached to the main device 2A and realizes a new function related to traffic management. By setting it as such a structure, a new function can be added to the traffic control central apparatus 2, utilizing the existing structure in the traffic control central apparatus 2. FIG. Note that the main body device 2A and the additional device 2B do not necessarily have to be juxtaposed, and for example, a configuration in which the main body device 2A and the additional device 2B are arranged in a remote place and connected to each other via a known communication network is possible.

  The main unit 2A includes a signal control record information storage unit 11 that stores signal control record information including signal control parameters used in past signal control, a road communication device 6, a travel time measurement terminal device 7, and a travel time. A travel time information storage unit 12 that stores a plurality of travel time information about each vehicle acquired from at least one of the information providers 8 (or calculated from information obtained from at least one of them); A control setting information storage unit 13 that stores control setting information including a signal control parameter, and a first signal control unit 14 that executes signal control related to traffic management are provided. Note that the main unit 2A can also appropriately store information related to the intersections constituting the road network necessary for traffic management and the connection form of each road section, information related to the number of lanes in each road section, and the like.

  The main unit 2A is configured by a computer having known hardware, and the first signal control unit 14 includes one or more processors. At least a part of each function of the main device 2A executed by the first signal control unit 14 is realized by the processor executing a predetermined signal control program. The main unit 2A includes a storage and memory for storing various information and data, an input device that allows a traffic manager (the manager of the signal control system 1) to perform setting input, and various information to the traffic manager. A display device or the like for displaying can be provided.

  In main device 2A, processing for generating signal control information is executed based on control setting information, vehicle sensor information, and the like, as in the conventional method. However, as will be described in detail later, the control setting information used in the main unit 2A is the blue time (usually the vehicle passage permission time when a blue or green light color is displayed, and the signal control parameter is split. The information (ie, the updated signal control parameter) is adjusted as appropriate from the additional device 2B.

  The additional device 2B executes a process for adjusting the blue time (hereinafter referred to as “signal control parameter adjustment process”) in accordance with a continuous change in the traffic situation on the target road. Is provided. Information such as travel time information and signal control performance information necessary for the additional device 2B to execute the signal control parameter adjustment processing can be appropriately acquired from the main device 2A.

  The second signal control unit 20 includes a signal waiting number calculating unit 21 that calculates the number of signal waiting times of each vehicle with respect to a plurality of vehicle outflow directions (hereinafter referred to as “specific outflow directions”) to be controlled at an intersection; Based on the calculated number of signal waiting times, a blue time adjustment value determination unit 22 that determines an adjustment value of the blue time for the current signal control parameter of the traffic light 3 regarding the specific outflow direction, and the determined adjustment value of the blue time is the current adjustment value Blue time adjustment for determining whether or not a predetermined allowable condition in the signal control parameter is satisfied and generating an adjustment value (hereinafter referred to as “parameter correction value”) of the blue time corrected to satisfy the allowable condition A value condition determination unit 23, a signal control parameter correction / update unit 24 that updates a signal control parameter based on a parameter correction value, and an updated signal control parameter And a control information display unit 25 for displaying the related information.

  Here, the signal waiting number of the vehicle calculated by the signal waiting number calculating unit 21 is the same as when the vehicle 4 reaches the intersection and decelerates or stops, and then becomes a blue signal (light color of the traffic light 3 is blue). Regardless of this, it is an estimated value assuming that the case where the vehicle has not passed through the intersection and is switched to a red signal again is counted as one time. However, the method for calculating the number of signal waiting times of the vehicle is not limited to the one shown here, and other methods (for example, an image based on a photographed image obtained by photographing a vehicle passing through an intersection with a camera) as necessary. The number of signal waiting times may be calculated by processing. Further, the correction of the adjustment value of the blue time (that is, the generation of the parameter correction value) is not necessarily essential and can be omitted as appropriate.

  In addition, the additional device 2B stores the signal waiting number storage unit 31 in which the signal waiting number calculated by the signal waiting number calculation unit 21 is stored, and the blue time adjustment value determined by the blue time adjustment value determination unit 22. The blue time adjustment value storage unit 32 and the parameter correction value storage unit 33 in which the parameter correction value generated by the blue time adjustment value condition determination unit 23 is stored.

  Furthermore, the additional device 2B includes information on a temporary adjustment value used for the blue time adjustment value determination process by the blue time adjustment value determination unit 22 described in detail later, and a blue time adjustment value condition by the blue time adjustment value condition determination unit 23. A setting value storage unit 41 for automatic adjustment that stores information on allowable conditions used for determination processing and a backup that stores control setting information (or signal control parameters) backed up by the blue time adjustment value condition determination unit 23 Control change information storage unit (backup information storage unit) 42, change history storage unit 43 in which the change history of parameter correction values by the blue hour adjustment value condition determination unit 23 is stored, and signal control parameter correction / update unit 24 And an update execution result log storage unit 44 in which an update execution result log is stored.

  Although the details will be described later, in the additional device 2B, after the process of generating the blue hour adjustment value (including the corrected blue time adjustment value) based on the number of signal waiting times, the blue time adjustment value is executed. The signal control parameter is updated based on The signal control parameter updated by the additional device 2B is appropriately sent to the main device 2A.

  The additional device 2B is configured by a computer having known hardware as with the main body device 2A, and the second signal control unit 20 includes one or more processors. At least a part of each function of the additional device 2B executed by the second signal control unit 20 can be realized by the processor executing a predetermined signal control program. Further, similarly to the main device 2A, the additional device 2B can be provided with a storage, a memory, an input device, a display device that constitutes the control information display unit 25, and the like. Note that the processor of the second signal control unit 20 can execute necessary processing in cooperation with the processor of the first signal control unit 14 described above.

  In the present embodiment, the additional device 2B is attached to the main device 2A. However, the additional device 2B is not necessarily realized as hardware. For example, the first signal control unit 14 of the main device 2A. It can also be realized as a part of the function of the signal control program executed by. Thereby, it becomes possible to implement | achieve the signal control system 1 which has a function similar to the above-mentioned additional apparatus 2B, without adding new hardware to the traffic control central apparatus 2. FIG.

FIG. 3 is an explanatory diagram illustrating an example of a road network in which a traffic signal 3 to which the signal control system 1 is applied is installed. In the present embodiment, the intersection I the installed traffic signal to _one of two roads prescribed in the road network are orthogonal (not shown) will be described. The intersection I ₁ includes a road section (link) L ₂ between the intersection I ₂ adjacent to the west side, a road section L ₃ between the intersection I ₃ adjacent to the east side, and an intersection I ₄ adjacent to the north side. A road section L ₄ between the two and a road section L ₅ between the intersection I ₅ adjacent to the south side are respectively connected. In addition, about the form of the intersection of the road network where the traffic signal 3 which applies the signal control system 1 is installed, not only what is shown here but various changes are possible. In addition, on-road communication device 6 and travel time measuring terminal device 7 (both not shown) are installed at appropriate intervals in each road section L ₂ -L ₅ .

4A and 5A are explanatory diagrams showing first and second examples of the peripheral configuration of the intersection I ₁ in the road network shown in FIG. 3, respectively. FIGS. 4B and 5B are FIGS. 4A and 5A, respectively. is an explanatory diagram showing an example of a signal aspect at the intersection I ₁ shown in.

In the signal control system 1, for example, as shown in FIG. 4A, straight from the road section L ₂ relates to a vehicle 4 that flows into the intersection I _1, in the direction of the road section L ₃ (specific outflow direction (1)) as a specific outflow direction If the, for the case of a right turn in the direction of the road section L ₅ as another specific outflow direction (specific outflow direction (2)), it is possible to perform signal control parameter adjustment processing based on the signal waiting times of the vehicles 4 .

In the example shown in FIG. 4A, a specific outflow direction to be controlled (1), the flow from the road section L ₂ at the intersection I ₁ (i.e., the same the flow direction to the intersection I ₁₎ (2) vehicle 4 Concerning. In addition, the signal indications related to the traffic of these vehicles 4 are the two indications consisting of the signal indication 1Φ and the signal indication 2Φ shown in FIG. 4B so that the right to pass is given to each of straight and left turns and right turns. It shall be shown. It should be noted that the signal display at the intersection I ₁ is more display (for example, 3 display) including the intersection road side including the road sections L ₃ and L _5. 2 shows an example in which two indications (signal indication 1Φ and signal indication 2Φ) are shown.

As described above, the signal control system 1 uses the number of times of waiting for the signal of the vehicle as an index as to whether or not the signal control is appropriately performed for the specific outflow direction of the vehicle, and adjusts the blue time regarding the specific outflow direction. More appropriate traffic signal control is possible in response to continuous changes in traffic conditions. In particular, the signal control system 1, as shown in FIG. 4A, it is possible to control the traffic in accordance with the continuous change in traffic conditions with respect to the vehicle 4 to equalize the inflow direction to the intersection I _1, thereby, The number of signal display combinations that can be adjusted by this method increases.

FIG. 4A shows an arrangement example of the road communication device 6. For example, traffic in the control central unit 2, the time until the vehicle 4 reaches the road communication device after passage disposed road section L ₃ of the road communication device 6_1 arranged upstream of the road section L ₂ 6_3 It is possible to generate travel time information in a specific outflow direction (1). Furthermore, the traffic control center unit 2, travel time information for a specific outflow direction (2) from the time until the vehicle 4 reaches the road communication device through a 6_1 by road communication device disposed in the road section L ₅ from 6_4 Can be generated. Furthermore, the traffic control center unit 2, a vehicle outflow direction of travel time information regarding left from the time until the vehicle 4 reaches the road communication device through a 6_1 by road communication device disposed in the road section L ₄ from 6_2 Can be generated. The traffic control central device 2 can similarly generate travel time information in the configuration shown in FIG. 5A described later.

In the signal control system 1, for example, as shown in FIG. 5A, the vehicle 4 flowing into the intersection I ₁ from the road section L ₂ goes straight in the direction of the road section L ₃ (specific outflow direction (1)) The signal control parameter adjustment based on the number of signal waiting times of each vehicle 4 with respect to the case where the vehicle 4 flows into the intersection I ₁ from the road section L ₄ and goes straight in the direction of the road section L ₅ (specific outflow direction (2)) Processing can be executed.

In the example shown in FIG. 5A, it is assumed that specific outflow directions (1) and (2) to be controlled flow into the intersection I ₁ from different road sections L ₂ and L ₄ , respectively. Further, the signal indications related to the traffic of these vehicles 4 are two indications consisting of the signal indication 1Φ and the signal indication 2Φ shown in FIG. 5B so that the right to pass is given simultaneously to straight travel, left turn and right turn. And

  In addition, the traffic manager can set a desired plurality of specific outflow directions according to the signal display. By setting a plurality of directions as specific outflow directions and executing the signal control parameter adjustment processing, there is an imbalance between the traffic flow with other outflow directions by adjusting the blue time focusing on only one outflow direction. It is possible to avoid the occurrence (for example, congestion and congestion in one outflow direction are alleviated as a result of the adjustment of the blue time, resulting in new congestion and congestion in the other outflow direction). Further, the specific outflow direction is not limited to the above example, and three or more directions having different signal indications can be set.

  6A to 6C relate to signal control parameter adjustment processing by the traffic control central device 2 (additional device 2B). It is a flowchart which shows the flow of the signal control parameter adjustment process by the traffic control central apparatus 2 (addition apparatus 2B). Here, FIG. 6A is a flowchart showing a flow of generating the parameter correction value, FIG. 6B is a flowchart regarding updating of the signal control parameter based on the parameter correction value, and FIG. 6C shows the signal control parameter and its It is a flowchart regarding the display of related information.

  Regarding the signal control parameter adjustment processing, as illustrated in FIG. 6A, the additional device 2B, when the signal waiting count calculation timing comes (ST101: Yes), calculates the signal waiting count calculation processing for calculating the vehicle signal waiting count regarding the specific outflow direction. (ST102), a blue time adjustment value determination process (ST103) for determining a blue time adjustment value for the current signal control parameter of the traffic light 3 based on the number of signal waiting times calculated in step ST102, and the determination in step ST103 Blue time adjustment that determines whether or not the blue hour adjustment value satisfies a predetermined allowable condition in the current signal control parameter and generates a parameter correction value (corrected blue time adjustment value) that satisfies the allowable condition The value condition determination process (ST104) is sequentially executed. Here, the calculation timing of the number of signal waiting times can be set as a predetermined cycle (for example, weekly or monthly), but is not limited to this, and the number of accumulated data (or accumulation period) related to aggregate information ) Or the like. Note that the timing for calculating the number of signal waits can also be set as a predetermined time. In that case, the set time does not necessarily have to be a constant interval.

  As described above, by determining whether or not the preset allowable condition is satisfied for the blue time of the signal control parameter, it is inappropriate for the traffic signal to be controlled based on the preset allowable condition. It is possible to avoid setting the blue time (and hence signal control information).

  Further, as illustrated in FIG. 6B, the adding device 2B executes a signal control parameter update process (ST105) for updating the signal control parameter based on the parameter correction value generated as described above. The updated signal control parameter is appropriately transmitted to the main device 2A.

  Further, as shown in FIG. 6C, when receiving the display request from the traffic manager, the additional device 2B executes a control information display process (ST106) for displaying the signal control parameter and the related information updated as described above. To do.

  FIG. 7 is a flowchart showing an example of the signal waiting number calculation process (ST102) in FIG. 6A, FIG. 8A is an explanatory diagram showing an example of total information regarding step ST204 in FIG. 7, and FIG. FIG. 8 is an explanatory diagram showing an example of the number of signal waiting times calculated in step ST205 in FIG.

As shown in FIG. 7, in the signal waiting number calculation process, first, in the additional device 2B, a plurality of specific outflow directions are set for the traffic of the vehicle 4 at the intersection I ₁ where the traffic signal 3 to be controlled is installed ( ST201). The specific outflow direction can be appropriately set as shown in FIGS. 4A and 5A described above, for example. The traffic manager can input the specific outflow direction from an input device (not shown) attached to the traffic control central device 2, or the preset specific outflow direction can be input to the traffic control central device 2. It can also be stored in a provided storage, memory or the like.

  Next, additional device 2B acquires travel time information from main unit 2A (ST202). Subsequently, the additional device 2B similarly acquires signal control result information (or control setting information) for the period corresponding to the target period of the travel time information acquired in step ST202 from the main device 2A (ST203). For the travel time (representative value) in the target period of the travel time information, for example, an average value or a percentile value of the period can be used.

  Next, the additional device 2B executes a totaling process for each piece of information acquired in steps ST202 and ST203, and stores the result as totaled information (ST204). In this totaling process, the vehicle traffic prohibition time (or the time for which the vehicle traffic is prohibited for the corresponding signal display (or the ratio to the cycle length)) from the signal control result information (or control setting information) The cycle length and the like are calculated and stored as the total information together with the travel time information. The total information can be stored in the signal waiting number storage unit 31 as related information of the signal waiting number described later.

In the tabulation information, for example, as shown in FIG. 8A, each data is tabulated at a predetermined period (in FIG. 8A, every 5 minutes from 10:00). Here, the total information includes travel time TT _{1 in} the specific outflow direction (1), travel time TT _{2 in} the specific outflow direction (2), inaccessible time TR ₁ of the vehicle in the specific outflow direction (1), and specific outflow direction. (2) The vehicle impermissible time TR ₂ , cycle length Cyc data, and the like are sequentially recorded.

Travel time TT 1 _(travel time TT ₂ as well), for example, a road after the vehicle 4 passes toward the particular outflow direction (1) the intersection I ₁ from a predetermined point before the road reaching the intersection I ₁ Is the time required to reach the predetermined point (average value of travel times related to the plurality of vehicles 4 and percentile value). The values in parentheses in the impassable time TR ₂ of a vehicle of the particular outflow direction (1) vehicle impassable time TR ₁ and the specific outflow direction (2), the ratio of cycle length in the case where the cycle length and 1 Indicates. In the aggregation information, a day type (weekday, Saturday, holiday) or a day type (day, month, Tuesday, Wednesday, Thursday, Friday, Saturday) may be used as the aggregation category.

  Referring to FIG. 7 again, subsequently, the additional device 2B calculates the signal waiting count (ST205).

More specifically, in the calculation of the number of signal waiting times in step ST206, first, the actualization signal waiting time TSW _{j, t} in the specific outflow direction j at time _t is calculated based on the equation (1.1).

但し、
ＴＴ_j,t：特定流出方向ｊの旅行時間
ＴＢ_j,t：特定流出方向ｊの旅行時間基準値
ＴＲ_j,t：特定流出方向ｊの車両の通行不可時間

However,
TT _{j, t} : Travel time in specific outflow direction j TB _{j, t} : Travel time reference value in specific outflow direction j TR _{j, t} : Non-passage time of vehicle in specific outflow direction j

The travel time reference value for the specific outflow direction j (the reference time set for the travel route of the vehicle with respect to the travel time TT _{j, t} ) can be set as appropriate by the traffic manager. Further, a value obtained by dividing a predetermined link length (a length of a predetermined road section until reaching the specific outflow direction j) by a vehicle regulation speed may be used as the travel time reference value.

Next, using the manifestation signal waiting time TSW _{j, t} and the cycle length Cyc, the signal waiting number NCS _{j, t} in the specific outflow direction j at time t can be calculated based on the equation (1.2). .

The calculated signal waiting times NCS _{j, t} and the actualized signal waiting time TSW _{j, t} are, for example, as shown in FIG. 8B, a predetermined period corresponding to the total information (in FIG. 8B, 10:00 to 5 minutes) And the corresponding total information is stored in the signal waiting number storage unit 31.

Thus, in the signal control system 1, the signal waiting times NCS _{j, t} can be easily obtained from the existing road communication device 6 and the travel time measurement terminal device 7 or the like, or the road communication device 6 and the travel time measurement terminal device. Since it is calculated based on the travel time TT _{j, t} that can be easily generated based on the information acquired from 7 etc., it can be calculated with a simple configuration. In addition, since the difference between the travel time TT _{j, t} and the travel time reference value TB _{j, t} is used for the calculation of the signal waiting number NCS _{j, t} , the signal waiting number is further increased. It is possible to calculate with high accuracy. Further, since the non-trafficable time TR _{j, t} (see Equation (1.1)) is used to calculate the number of signal waiting times NCS _{j, t} , it is possible to eliminate the influence of the vehicle signal waiting during the non-passable time. It is.

  FIG. 9 is a flowchart showing an example of the blue time adjustment value determination process (ST103) in FIG. 6A, and FIG. 10 shows the number of signal waits (maximum value) and a temporary signal regarding a predetermined signal display (specific outflow direction). 11 is a table showing an example of the relationship with the adjustment value. FIG. 11 is a flowchart showing a method of calculating the final adjustment value of the blue time in the case of 3 indications in step ST304 in FIG. 9, and FIG. 12 is a flowchart showing a modification of the method for calculating the final adjustment value of the blue hour shown in FIG.

As shown in FIG. 9, in the blue time adjustment value determination process, first, in the additional device 2B, the actual signal waiting time TSW _{j, t} and the signal waiting number NCS _{j, t} calculated by the signal waiting number calculation process described above. Is acquired (ST301). Subsequently, in order to calculate the manifestation waiting time and the signal waiting number in the signal indication k, the manifestation in the signal indication k corresponding to the specific outflow direction is based on the equations (2.1) and (2.2). The maximum signal waiting time TSW _{k, t} and the signal waiting number maximum value NCS _{k, t} are calculated (ST302). In this way, with regard to the actualization waiting time and the number of signal waiting times, it is possible to appropriately reduce traffic congestion and congestion by using the maximum value corresponding to a greater degree of congestion.

但し、
ＴＳＷ_j,k,t: 特定流出方向ｊの顕在化待ち時間であって、その信号現示がkである場合
ＮＣＳ_j,k,t: 特定流出方向ｊの信号待ち回数であって、その信号現示がkである場合

However,
TSW _{j, k, t} is the actual waiting time in the specific outflow direction j, and the signal indication is k. NCS _{j, k, t is the} number of signal waits in the specific outflow direction j, and the signal When the indication is k

Next, using the maximum value NCS _{k, t} of the signal waiting number of the signal indication k, for example, the relationship between the maximum value of the signal waiting number shown in FIG. 10 and the temporary adjustment value IPA related to the signal indication k is shown. Temporary adjustment value IPA is determined from the table (ST303). In FIG. 10, the temporary adjustment value IPA is shown as a ratio (%) to the cycle length Cyc.

Next, based on the formula (3.1) and the formula (3.2), the final adjustment value FPA _{1, t} of the blue time of the signal indication 1Φ (k = 1) and the signal indication 2Φ (k = 2) The final adjustment value FPA _{2, t of the} blue hours is calculated (ST304). Here, δ (x) is an index indicating whether or not the actualized signal waiting time related to the target signal display tends to increase, which is obtained from Expression (3.3). In other words, when the actualization signal waiting time does not tend to increase, δ (x) = 0, and the final adjustment value FPA _{1, t} (or FPA _{2, t} ) also becomes 0 (that is, the blue time adjustment) The value is practically not set.) Measures against traffic congestion are less effective when congestion is decreasing, and when congestion is increasing, congestion can be prevented and higher effects can be expected. Therefore, as in the present method, it is possible to prevent a traffic jam with respect to the display by making an adjustment by paying attention to the case where the actualization signal waiting time increases for the display.

In Step ST304, the final adjustment value of the blue time of the signal display 1Φ is based on the equations (4.1) and (4.2) instead of the equations (3.1) and (3.2). It is also possible to calculate the final adjustment value FPA _{2, t} of the blue time of the FPA _{1, t} and the signal display 2Φ. By considering the situation of the entire intersection as in this method and adjusting the actual signal waiting time of the entire intersection, it is possible to prevent congestion as a whole by making adjustments.

  Further, in the above-described example, the calculation of the final adjustment value of the blue time in the case of the interval between the two indications (for example, between the first indication of the three indications and the two indications of the third indication) has been described. However, it is also possible to calculate the final adjustment value of the blue time for three or more displays.

In the case of 3 or more indications, for example, as shown in FIG. 11, preprocessing for obtaining ΔIPA _t is executed based on the equation (5.1) (ST401). Subsequently, when the calculated ΔIPA _t = 0 (ST402: Yes), the blue hour final adjustment value FPA _{k, t} = 0 (that is, the blue time adjustment value is not substantially set) (ST403). ).

On the other hand, if the calculated ΔIPA _t is not 0 (ST402: No), the final adjustment value FPA _{L, t of the} increased allocation blue hour is calculated for the current indication _L based on the formula (5.2). The final adjustment value FPA _{M, t for} the blue time of the reduced allocation is calculated for _M based on the equation (5.3) (ST404).

  Finally, the final adjustment value of the blue time may be adjusted based on the equation (5.4). Here, n is a coefficient that can be changed by the traffic manager to adjust the final adjustment value of the blue hour.

  For example, as shown in FIG. 12, it is also possible to calculate the final adjustment value of the blue time in the case of three or more indications by a generalized equation.

In FIG. 12, based on the equation (6.1), preprocessing for obtaining ΔIPA _t is executed (ST501). Subsequently, when the calculated ΔIPA _t = 0 (ST502: Yes), the blue hour final adjustment value FPA _{k, t} = 0.

On the other hand, if the calculated ΔIPA _t is not 0 (ST502: No), the final adjustment value FPA _{L, t of the} increased allocation blue hour is calculated for the current indication _L based on the formula (6.2). The final adjustment value FPA _{M, t} for the reduced blue hour is calculated for _M based on the equation (6.3) (ST504). The calculated final adjustment values FPA _{L, t} and FPA _{M, t} are stored in the blue time adjustment value storage unit 32.

  The calculation of the blue hour adjustment value (the blue hour final adjustment value) can be executed in a predetermined cycle (for example, weekly or monthly) set in advance according to the number of signal waiting times. . Accordingly, by appropriately determining the cycle, it is possible to control the traffic signal more appropriately according to the continuous change in traffic conditions on various roads. Note that the blue hour adjustment value can be calculated at a plurality of predetermined times. In that case, the time for calculating the adjustment value of the blue time does not necessarily have to be a constant interval.

In the example shown in FIGS. 11 and 12 described above, the final adjustment value of green time for current-L using DerutaIPA _t at time t FPA L, _t and final adjustment value of green time for Gen示M FPA _{M , t} is calculated _, but the adjustment value of time t−1 is determined based on the following formula (7.1) and formula (7.2), taking into account the delay of travel time measurement, for example. Also good. Here, the time t-1 is merely an example, and for example, the time t-2 can be used.

  FIG. 13 is a flowchart showing an example of the blue time adjustment value condition determination process (ST104) in FIG. 6A, and FIG. 14 is an explanatory diagram showing an example of the parameter correction value generated in step ST603 in FIG. It is.

In the blue time adjustment value condition determination process, first, the additional device 2B uses the blue time final adjustment value FPA _{k, t} related to the signal indication k calculated by the above blue time adjustment value determination process as the blue time adjustment value. Acquired (ST601), and further, an allowable condition for the adjustment value of the blue time is acquired (ST602). For example, the allowable condition may be an upper limit value and a lower limit value of the blue hour value (or the blue hour adjustment value).

  Subsequently, the additional device 2B generates a parameter correction value by correcting the adjustment value of the blue time based on the acquired allowable condition, for example, as shown in FIG. 14 (ST603). In this case, for example, when the adjustment value of the blue time exceeds the upper limit value based on the allowable condition, the upper limit value of the blue time can be set as the parameter correction value. For example, when the adjustment value of the blue hour is less than the lower limit value based on the allowable condition, the lower limit value of the blue hour can be set as the parameter correction value. The generated parameter correction value is stored in the parameter correction value storage unit 33.

  In this way, by setting the upper limit value and the lower limit value (or at least one) of the blue time of the signal control parameter in the current signal control information as the allowable condition, based on a simple condition, for the traffic signal to be controlled It is possible to avoid setting an inappropriate passage permission time. In addition, when the blue hour adjustment value does not satisfy the allowable condition, the blue time adjustment value is corrected so as to satisfy the allowable condition (a parameter correction value is generated). It becomes possible to set the adjustment value of the blue hour.

  Thereafter, the additional device 2B stores the current control setting information (or signal control parameter) before applying the parameter correction value as a backup, and further adjusts the blue time adjustment value related to the generated parameter correction value and Information on allowable conditions is also stored (ST604). In addition, the additional device 2B can also store a history of parameter correction values and the like.

  In this way, by storing the blue time information in the control setting information before the parameter correction value (blue time adjustment value) is applied, when the adjustment value of the traffic permission time is not valid (for example, traffic Even when the desired effect regarding the above cannot be obtained or when it is determined by the traffic manager to be an inappropriate value), the adjusted blue time can be easily changed to the value before the adjustment.

  FIG. 15 is a flowchart showing an example of the signal control parameter update process (ST105) in FIG. 6B. In the signal control parameter update processing, first, the additional device 2B acquires the parameter correction value calculated by the above-described blue time adjustment value condition determination processing (ST701), and this parameter correction value (or a signal control parameter including the parameter correction value). Is used to update (overwrite) the control setting information in the control setting information storage unit 13 (ST702). Thereafter, the additional device 2B outputs and stores a result log of the update execution (ST703). The traffic manager can always monitor the control setting information, and if there is a change in information related to signal control (for example, a change in signal display), the traffic control parameter updating process may be stopped. it can.

  FIG. 16 is a flowchart showing an example of the control information display process (ST106) in FIG. 6C, and FIGS. 17A-17D show the history information list and parameter correction values displayed in the process of step ST802 in FIG. It is explanatory drawing which shows the example of the notification information regarding the information list, the parameter (blue time) information after correction | amendment, and the parameter after correction | amendment.

  As shown in FIG. 16, in the control information display process, first, control setting information and related information (change history, control setting information for backup, etc.) from main unit 2A are acquired (ST801), and a control information display unit The information is displayed on the display device 25 (802).

  As information displayed in the control information display process, for example, as shown in FIG. 17A, the history information list includes correction of the adjustment value of the blue hour at a predetermined date and time with respect to the target intersection (name, management number). Information regarding the success or failure of implementation (generation of parameter correction values) is included. Also, for example, as shown in FIG. 17B, the parameter correction value information list includes parameter correction value values for each signal display (here, 3 displays of 1Φ-3Φ) at a predetermined time. Also, for example, as shown in FIG. 17C, the parameter correction value for each signal display (here, 3 displays of 1Φ-3Φ) is displayed in the corrected parameter (blue time) information list. The value of the parameter (here, the blue time) after being applied (here, the ratio to the cycle length) is included. Also, for example, as shown in FIG. 17D, the notification information regarding the corrected parameters includes success / failure of the implementation of the parameters shown in FIG. Information is included. By displaying such information, the traffic manager can easily determine whether or not the determined adjustment value (parameter correction value) of the blue hour is appropriate.

  FIG. 18 is an overall configuration diagram showing a modification of the signal control system 1 according to the present embodiment. In FIG. 18, the same components as those of the signal control system 1 shown in FIG. 2 described above are denoted by the same reference numerals, and items not particularly mentioned below are the same as those described above.

  In the example of FIG. 2 described above, the additional device 2B is provided as a part of the traffic control central device 2. However, the present invention is not limited to this. For example, the additional device 2B including a maintenance computer installed on the road side is illustrated in FIG. As shown, it is possible to adopt a configuration that is attached to a signal controller (signal control device) 103 that is installed together with the traffic signal 3 (here, mainly composed of a signal lamp). Thereby, it is possible to execute processing for adjusting the blue time in the signal control parameter even for the traffic light 3 that is not under the control of the traffic control central device 2.

  As mentioned above, although this indication was explained based on specific embodiments, these embodiments are illustrations to the last, and this indication is not limited by these embodiments. Note that all the components of the signal control device, the signal control system, the signal control method, and the signal control program according to the present disclosure shown in the above embodiment are not necessarily essential, and at least as long as they do not depart from the scope of the present disclosure. It is possible to select appropriately.

  A signal control device, a signal control system, a signal control method, and a signal control program according to the present disclosure enable control of a traffic signal according to a continuous change in traffic conditions, and control a traffic signal installed at an intersection or the like. It is useful as a signal control device, a signal control system, a signal control method, a signal control program, and the like that provide signal control information.

1: Signal control system 2: Traffic control central device (signal control device)
2A: Main unit 2B: Additional device 3: Signal device 4: Vehicle 5: Vehicle detector 6: Road communication device 7: Travel time measurement terminal device 8: Travel time information provider 11: Signal control result information storage unit 12: Travel time Information storage unit 13: Control setting information storage unit 14: First signal control unit 20: Second signal control unit 21: Signal waiting time calculation unit 22: Blue time adjustment value determination unit 23: Blue time adjustment value condition determination unit 24: Signal control parameter correction / update unit 25: Control information display unit 31: Signal waiting number storage unit 32: Blue time adjustment value storage unit 33: Parameter correction value storage unit 41: Automatic adjustment set value storage unit 42: For backup Control setting information storage unit (backup information storage unit)
43: Change history storage unit 44: Update execution result log storage unit 103: Signal controller (signal control device)

Claims (15)

A signal control device comprising a processor for providing signal control information for controlling a traffic light installed at an intersection,
The processor is
For a plurality of vehicle outflow directions at the intersection, calculate the number of signal waiting times of the vehicle,
A signal control device, wherein an adjustment value of a passage permission time for the signal control information of the traffic light regarding the vehicle outflow direction is determined based on the signal waiting number.   The signal control device according to claim 1, wherein the determination of the adjustment value of the passage permission time is executed at a predetermined cycle.   The signal control device according to claim 1, wherein the signal waiting number is calculated based on a travel time of a target vehicle passing through the intersection.   The signal control according to claim 3, wherein the signal waiting number is calculated based on a difference between the calculated travel time and a reference time set for a travel route of the vehicle related to the travel time. apparatus.   5. The signal control device according to claim 1, wherein the signal waiting number is calculated based on a non-passable time of the target vehicle in the vehicle outflow direction.   The signal control device according to claim 1, wherein the processor determines whether or not the adjustment value of the passage permission time satisfies a preset allowable condition.   The signal control apparatus according to claim 6, wherein the permissible condition includes at least one of an upper limit value and a lower limit value of a passage permission time in the signal control information.   8. The processor according to claim 6, wherein the processor corrects the adjustment value of the passage permission time so that the permission condition is satisfied when the adjustment value of the passage permission time does not satisfy the permission condition. The signal control apparatus as described.   The signal control according to any one of claims 1 to 8, further comprising a backup information storage unit that stores information on the passage permission time before the adjustment value of the passage permission time is applied. apparatus.   The processor calculates a signal waiting number of vehicles for each of the plurality of vehicle outflow directions to which different indications are applied in the traffic light, and based on the plurality of signal waiting times, for each of the vehicle outflow directions, The signal control device according to claim 1, wherein an adjustment value of the passage permission time is determined.   The signal control device according to claim 10, wherein the plurality of vehicle outflow directions include a plurality of outflow directions related to a vehicle having the same inflow direction to the intersection.   The signal control device according to claim 1, further comprising a display unit that displays an adjustment value of the determined passage permission time.   A signal control system comprising: the signal control device according to any one of claims 1 to 12; and a road communication device that acquires information on a travel time of a vehicle passing through the intersection. A signal control method for providing signal control information for controlling a traffic light installed at an intersection,
For a plurality of vehicle outflow directions at the intersection, calculate the number of signal waiting times of the vehicle,
A signal control method comprising: determining an adjustment value of a passage permission time for the signal control information of the traffic light regarding the vehicle outflow direction based on the number of waiting times for the signal. A signal control program for causing a computer to execute processing for providing signal control information for controlling a traffic light installed at an intersection,
Calculating a vehicle signal waiting count for a plurality of vehicle outflow directions at the intersection; and
A signal control program for causing the computer to execute a step of determining an adjustment value of a passage permission time for the signal control information of the traffic light regarding the vehicle outflow direction based on the number of waiting times for the signal.

Images